This safety light for nighttime walks with your dog has four light modes: strong, weak, slow flash, strobe (fast flash). It's extremely easy to attach to your dog's collar or harness directly. It's also waterproof for rainy days, and tough enough to endure hitting the floor. Its small size makes it very easy to carry, and its large lighting range means that you won't be able to lose your dog in the dark. Crafted with aluminum alloy material, making it durable and giving it excellent thermal conductivity for easy rechargeability.